Enable Deno namespace by default in Workers

[nayeemrmn]

Remove WorkerOptions::deno, though it will be brought back with a different type once permissions forking (#4867) is implemented.

[kitsonk]

Is there an issue for:

once permissions forking is implemented

If not can we get one and link it here, so it is more clear what the roadmap is for workers?

[bartlomieju]

Permission forking in workers issue:
#4867

Open PR:
#8215

The PR linked above is currently blocked by discussion in:
#8266

I think we could keep WorkerOptions::deno but it would have no effect after landing #8178

[Soremwar]

#8215 mantains the Deno namespace option under the interface suggested here #4867 (comment) (deno.namespace: boolean)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. Thank you for your contributions.